Our economic life is inseparable from the large and small steel tanks,steel tanks in the development of the national economy plays an important role is irreplaceable. With the continuous development of the tank industry, more and more industries and enterprises to use the storage tank, more and more enterprises into the storage tank industry, steel storage tank is a variety of liquid (or gas) raw materials and finished products of special equipment, for many enterprises without storage tanks can not be normal production, In particular, national strategic material reserves are inseparable from a variety of capacity and type of storage tanks. Most of the storage facilities in China are mainly in the ground tank, and the metal structure is mostly.